23
■
When the ODU connects only one IDU (DHW kit cannot
be independently connected to the ODU)
Table 14-3
Model
(kW)
Max height drop (m)
Length of
refrigerant
pipe (m)
Number
of
elbows
ODU on top
ODU at
bottom
8
10
10
20
Less
than 10
10
20
20
20
12
20
20
30
14
30
20
40
16
30
20
40
14.1.5 Refrigerant Pipe Selection
Select refrigerant pipe and branch joint according to Table
14-4 to 14-9.
● Branch header can also be selected to connect
pipes and IDUs. Meanwhile, the relevant
requirements in the Installation Manual must be
followed
● The selection of branch header depends on the
quantity of branches it connects to.
● Branches and other branch heads cannot be
installed downstream of the initial head branch.
Caution
Main pipes (L1) and first branch joint (A) according to the
ODU
Table 14-4
ODU
capacity
(kW)
Main pipe size when the total
equivalent piping length of
gas side is i < 90 m
(mm OD)
Branch joint
Gas pipe (Φ) Liquid pipe (Φ)
8~10
Φ15.9
Φ9.52
FQZHN-01D
12~16
Φ15.9
Φ9.52
FQZHN-01D
Table 14-5
ODU
capacity
(kW)
Main pipe size when the total
equivalent piping length of
gas side is ≥ 90 m
(mm OD)
Branch joint
Gas pipe (Φ) Liquid pipe (Φ)
8~10
Φ15.9
Φ9.52
FQZHN-01D
12~16
Φ19.1
Φ9.52
FQZHN-01D
Increase the main gas pipe size when the total
equivalent piping length of gas side is ≥ 90 m,
as listed in Table 14-5.
Caution
Pipe diameter and branch joints between ODU and IDU
according to downstream IDU (DHW kit and hydraulic
module need not to be included)
Table 14-6
Total capacity
of the
downstream
IDUs
(×100 W)
IDU main pipe size
(mm OD)
Branch joint
Gas pipe (Φ) Liquid pipe
(Φ)
A<63
Φ12.7
Φ6.35
FQZHN-01D
63≤A≤160
Φ15.9
Φ9.52
FQZHN-01D
A>160
Φ19.1
Φ9.52
FQZHN-01D
● The corresponding maximum values listed in able
14-5, Table 14-6 and Table 14-7 shall be used as
the main pipe (L1) size, the first ranch joint (A)
size and the main pipes (L2-L5) of IDU.
● Choose IDU main pipes and branch joints
between the first branch joint and IDUs from the
above table in accordance with the total capacity
of all the IDUs connected downstream.
Caution
IDU auxiliary pipe (a to f)
Table 14-7
IDU type
IDU capacity
(×100 W)
IDU pipe size (mm OD)
Gas pipe (Φ) Liquid pipe (Φ)
VRF IDU
A<63
Φ12.7
Φ6.35
63≤A≤160
Φ15.9
Φ9.52
DHW kit
-
Φ12.7
Φ6.35
hydraulic module
-
Φ15.9
Φ9.52
Size of ODU stop valve
Table 14-8
ODU model
(kW)
Size of ODU stop valve (mm)
gas side
liquid side
8
Φ15.9
Φ9.52
10
Φ15.9
Φ9.52
12
Φ15.9
Φ9.52
14
Φ15.9
Φ9.52
16
Φ15.9
Φ9.52
The wall thickness of the refrigerant piping conforms to
applicable laws and specifications.
The minimum wall thickness of the R32 piping must be
consistent with the table below.
Table 14-9
Piping outer
diameter (mm) Minimum thickness (mm) Temper grade
ø6.35
0.80
M-type
ø9.52
0.80
M-type
ø12.7
1.00
M-type
ø15.9
1.00
M-type
ø19.1
1.00
M-type
ø22.2
1.00
Y2-type
Содержание KMF-80 DVR5
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